recreate the users configuration folder.
locate the configuration folder that contains the WinFileCache-D06F2AB8.dat file and rename it.
Now restart DW to have that file recreated. Close DW, and then open the extension manager. in the extension manager, remove the extensions then reinstall them.
after installing the extensions in DW, when you open DW it will launch the web assist installer to complete the installation. if the WA installer does not launch automatically, open a php page to force the installer to open, after it completes the installation, make sure to restart Dreamweaver.